{
  description = "Add support for deserialization of pydantic child models";

  outputs = { self }: let
    system = "x86_64-linux";
    packageName = "pydantic-uuid-model";
    version = "1.1.0";
  in {

    overlays = let
      composeExtensions = (
        f: g: final: prev:
        let
          fApplied = f final prev;
          prev' = prev // fApplied;
        in
        fApplied // g final prev');
    in {
      default = builtins.foldl' composeExtensions (final: prev: {}) [
	self.overlays.pydantic
        self.overlays."${packageName}"
      ];
      pydantic = (pkgs-final: pkgs-prev: {
        pythonPackagesExtensions = pkgs-prev.pythonPackagesExtensions ++ [
          (final: prev: {
            pydantic = pkgs-prev.python3Packages.callPackage ./pypi.nix {
	      pname = "pydantic";
	      version = "1.9.1";
	      sha256 = "sha256-HtmHw/8p//f9jD6jo+qHetMQquLvmImhGeItPy2waRo=";
	    };
          })
        ];
      });
      "${packageName}" = (pkgs-final: pkgs-prev: {
        pythonPackagesExtensions = pkgs-prev.pythonPackagesExtensions ++ [
          (final: prev: {
            "${packageName}" = pkgs-prev.python3Packages.callPackage ./default.nix {
              inherit packageName version;
      	    };
          })
        ];
      });
    };

    #devShell."${system}" = let
    #  pkgs = import nixpkgs {
    #    inherit system;
    #    overlays = [ self.overlays.default ];
    #  };
    #  packages = [ (pkgs.python3.withPackages (ps: [ ps."${packageName}" ])) ];
    #in pkgs.mkShell { inherit packages; };

  };
}